[TCML] Bi-Polar TC

[tesla@xxxxxxxxxxxxxx]

Here's a link to my Bi-Polar coil:  http://www.tesla-coil.com/Bipolar.htm

I never considered grounding the center of the secondary.  I designed and built
this coil due to my neighbors firing arrows with explosives strapped to the
shaft at me (I'm not kidding, still have the al arrows) when I rolled my 1/4
wave out the front of the house to fire it up.  I wanted something that didn't
need a ground and could be used indoors, hence the argon filled acrylic
cabinet.  It uses a Franceformer 9kV 50mA transformer.

Cheers,

John Cooper
www.tesla-coil.com




Quoting sparktron01@xxxxxxxxxxx:

> Shannon, all 
> 
> Working in the electrical power industry, EPDM cable is used almost
> universally 
> in "non shielded" medium voltage applications. I have personally used 15kV 
> insulation cable on 13.8 kV installations. Several references: 
> 
> http://en.wikipedia.org/wiki/EPDM_rubber 
> 
>
http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel4/5934/15805/00732949.pdf?arnumber=732949
> 
> 
> http://www.awcwire.com/ProductTOC.aspx?id=EPDM 
> 
> Interesting history on high voltage insulation compounds and advancements in
> EPDM type compounds. 
>
http://www.indianapoliscompounds.com/downloads/EPR_cables_final%20version_4.04.05.PDF
> 
> 
> http://www.electriccablecompounds.com/intranet/index.php?cmd=view_app&id=6 
> 
> I know the polymer is available as cable insulation, but was not aware it is
> available 
> in engineered "shapes" (plate, sheet, channels, angles, etc.) 
> 
> Regards 
> Dave Sharpe, TCBOR/HEAS 
> Chesterfield, VA. USA 
> 
> 
> ----- Original Message ----- 
> From: "Weinhold Shannon L" <Shannon.L.Weinhold@xxxxxxxxxxxxxxx> 
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
> Sent: Thursday, February 12, 2009 5:44:22 PM GMT -05:00 US/Canada Eastern 
> Subject: RE: [TCML] Bi-Polar TC 
> 
> Oh, hey, the guy that runs that site, Jeff, is a heck of a nice guy and 
> very knowledgeable. I'm sure he'd be glad to share some information with 
> you. 
> I actually built mine after seeing his. 
> He used hard EPDM rubber, 2 inch wide and 3/16" thick, to physically 
> link his primary to the secondary. And he used copper ribbon for the 
> primary windings, ran in between the layers of rubber. 
> Apparently this particular type of rubber has excellent insulating 
> properties. 
> 
> 
> -----Original Message----- 
> From: jhowson4@xxxxxxxxxxx [mailto:jhowson4@xxxxxxxxxxx] 
> Sent: Wednesday, February 11, 2009 1:42 PM 
> To: Tesla Coil Mailing List 
> Subject: Re: [TCML] Bi-Polar TC 
> 
> 
> oh no! some how the link I had was deleted. Here is the type I am trying 
> to make. 
> here is the link 
> http://www.electrotherapymuseum.com/2007/TSC/index.htm 
> 
> ----- Original Message ----- 
> From: jhowson4@xxxxxxxxxxx 
> To: "tesla list" <tesla@xxxxxxxxxx> 
> Sent: Wednesday, February 11, 2009 9:41:55 AM GMT -05:00 US/Canada 
> Eastern 
> Subject: [TCML] Bi-Polar TC 
> 
> 
> Hey Guys I was wondering if i could pick your brains about the bipolar 
> Tesla coil. Specifically what the best way to mount the secondary Like 
> this would be. I am planning on making a small 9kv 30ma coil over the 
> summer 
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